Blow-case



M. B. COOKE.

BLOW CASE. APPLICATION FILED SEPT 2? [919.

Patentd Apr. 26, 19%

2 SHEETS-SHEET I.

M. B.-CO0KE. BLow CASE.` APPLICATION FILED SEPT 27,1919.

1,376,188. Patented Apr. 26, 1921.

2 SHEETS-SHEET 2.

eater MAURICE B. COOKE, OF CARNEYS ?Ol\l'l, NEVI JERSEY, SSGNOR T0 E. DUPNT DE NEMOURS t COMPANY, OF LEZHGTON, DELAWARE, A CORPORATION OF DELA.-

BLOW-CASE.

LSWSS.

Specification of Letters laitentA Pawn/giga MAH-a 259 gg Application ledSeptember 27, 1919. Serial No. 326,833. l

To ZZ f1.0 hom t may concern:

Be it known that l, lilriniiion B. Cooirn, a

` citizen ofthe United States, and a resident or air pressure to thecontained liquid there by to forcev the liquid out ofthe container. Suchan egg 1s commonly used as a substitute for a pump in the handling ofcorrosive liquids such as sulfuric acid. The egg is,

commonly, constructed of iron or steel havino` Jhe strenvth to resistthe fluid ressure.

ZD D

But, for use with liquids, as sulfuric acid, which. would cori'ode ironor steel, the egg should be lined with a different material,as

lead, applied to the shell of iron or steel. But these lining materialsare, frequently, not of great rigidity. The diiliculty is, then, thatsuch eggs are unsatisfactory for use in raising liquid from a lower'level into the egg by the application of suction, for in such cases thelining is drawn away from the shell, causing leaks in, or completecollapse of, the lining. I have devised a lined egg in which allinequalities of pressure on the lining are eliminatecl,avlier'eby theegg can be used for theliftingef liquids from a level lower than thatofthe egg, for drawing of liquid through a filtering medium, and soforth, without injury to the lining of the egg.

One object of the vinvention is to provide a lined blow egg having alining which is at all times yfree from inequalities of pres-r sure.

Another object having a lining that will not buckle or collapse when theegg is subjected to evacuation, partial or complete.v y

Another object is to provide an apparatus for the handling of liquid andincluding a erally upon devices of the characterV indiev blow case is toprovide a blow egg ated, my invention yconsists in the following mattershereinafter described and claimed.

l/lifithout restricting my invention thereto, l describe it by referenceto the accompanying drawings illustra-ting an embodiment thereof.

' ln the drawings ligure l isa somewhat conventional View, principallyin diametrical sectional elevation, of' a blow egg construction inaccordance with myl invention;

ll ig. 2 is a section, crosswise of the valve plug, of a representativeone of the two-way' valves;

Fig. 8 is a section, crosswise of the valve plug, of the three-wayvalve;

'Fig i is a detail sectional view of a representative one of the pipeconnections, and Fig. 5 lis a conventional diagrammatic side elevationalassembly of an arrangement including an egg, constructed in accordancewith my invention.

' rlhe shell, or outer receptacle, l, (Fig. l) ofthe egg is of materialcapable of with standing the degrees of pressure and. vacuum to be used,as of iron or steel. The lining, or inner receptacle, 2, of lead orwhatever'L material is desira'ile for contact with the liquid to behandled, is receivedwithin the shell l. nd is spaced all about from theshell l, as by lugs, as 3, on the lining 2, to provide the space il.This space ,4r- 4permits thel application of the same pressure to theouter side of the lining as to the inner side. The pressure pipes 5 and6 are for the introduction of fluid under pressure, z'. c. ab-

solute pressure above atmospheric, as gas or serving to force thehandled liquid out of the receptacle. rllie suction pipes, 7 and 8,

are forthe application of suction, z'. e. absolute pressure belowatmospheric, t-o theinner and outer sides of the lining, the suctionthrough the pipe 8 serving to draw liquid into the receptacle. The pipes5 and 6 are teed at' 9 to the fluid supply pipe 10, se that they are incommunication with eac `other and the pipe l0. Air or gas under aressureis supplied to the pipe 10 by any suitable means` as the `compressor P(Fig. i5), The pipe '.8 communicates with the inner the pipe 8.

V pipes side of the lining through the lowerend of the pipe 585.Conveniently, a catch box 11 is provided, to which suction is appliedthrough the pipe 12 by any suitable means as the vacuum pump S (1*1 ig.5), the pipes 7 and 8 enter the catch boX and are placed incommunication thereby.

two-Way, or straightimy valve, 18, say such as illustrated in Fig. 2,and having a single passage 141 through its plug 15, is inserted in thepipe 5 above its connectioz. with Similar valves 16, 17, and 18, areinserted in the pipes 7, 8, and G, as indicated. A three-Way valve, 19,such, for e2;- ainple, as' 'that illustrated in Fig. 8, is inserted inthe pipe 2O that connects the pipes 6 and 7 with the space el. Thisvalve has thethrough passage 2l and side passage 22, the latter forconimunication with the atmosphere for dravving-any condensationfromjthe space d.

The pipe 28h87 is the entrance pipe fory the yliquid to be handled andthe pipe .2e- 88, extending nearly lto the bottom of the receptacle, isthe discharge pipe lor the liquid. .Each pipe is provided with ativo-Way valve, 25 or 2G, similar, preferably, to the valve 18. Both thereceptacles 1 and 2 are fully closed from the atmosphere and *from eachother,

`except for such communication as is afforded by the piping and valvesdescribed.

The apparatus, as above described, provides for the handling of liquid,under suction and under pressure Without the creation of anyinequalities of pressure on the lining. This Will be evident from abrief statement of the operation :-V7ith the valves 18, 26, and 18,closed, the valves 17, 25, 16, onen, and the valve 19 open so that thethrough passage 21 places the space l and the valve 16 in communicationand the passage 22 is closed ig. 8), suction is applied through the pipe12 and, so, to pipes 7 and 8, and the charge drawn in from the containerG (F It will be seen that the reduced pressure oramount of vacuumis thesame on the inside and on thc outside oi the lining. Also, as thesuction is released, the pressure is kept equalized on the inside and onthe outsideotV the lining, due to the fact that 7 and 8 are incommunication by Way of the boxV 11. In blowing the charge, the valves17 ,25, and 16, are closed, the valves .18,1 1.8, and "26 opened, andthe valve 19 opened so that its through passage 21 places the space land theV valve 18 in communication, While the passage 22 is closed, andair or gas, under pressure, is admitted through 4the valve 18, andvalves 18 and 19. As much pressure can be .use das the shell 1 Willstand, since the lining 2 is subjected to no inequalities ofk pressure.As the last part of the chargeleaves the egg the air pressure Will besuddenlyloivered, the rate of lowering dependingvon the supply and thesize of the outer side oi" the lining, orV

low pipe. But this sudden lowering of the pressure in the container Willnot cause the lining to collapse as the pressure outside of the liningwill instantly ifall, due to the fact that the air supply line is incommunication., at the connection 9, with both sides of the lining.rllhe air pressure will seek theline of the least resista ce, e. by-passto the delivery receptacle D (Fig. 5) by Way of the container 2.. it isdesired that the blow`v e stopped more quickly than can be done bycutting oli" 'the air supply, the valve 17 can be opened which willallow the air to escape through the catch box 11.

As to the details:

rlhe catch boX 11 is provided with a drain cock 2'1". The valve 19, withthe side passage 22, provides for. the drainingv of anycondensate fromthe space Z1, Whenthe valve 19 is turned VtoV close the passage to thevalvesl 16 and 18 and open the space to the atmosphere. The shell 1 isoi:V cylindrical form with its lower end in the form of a bulged head asshown;V the pipe 2O is threaded into this head. l The upper end oi' thereceptacle 1 carries a flange 28 to which the cover' 29 is bolted bythebolts 8G, a suitable gasket .81 icinginserted.- This cover carries thepipes 82, 88, and 84, screwed therein, and each carrying -llange 82a,88a, or84a. The pipes 5, 24, and 28. each carny ailange 5u, 24A-or 28a,forbolting to, and coperationvvith, the flanges 82, etc., for connectingthe pipes to the coverspipes.

In the present instance, the lining, or receptacle 2, is of lead,similar in form to the and 8&1, neatly jamming intothe same andertending a short distance above them. At v upper ends the pipes 85, 88,and 87V are spread and beatendown to torni harige-inte gaskets a, 88,and 87a. Similarly, the lead linings oi pipes 28 and 2&1 are spread andVbeaten down to iorm gaskets 28b and 2111). In

Fig. 1, the connection at pipe is illustrated on an enlarged scale andvit will be understood that this is typicaloithat at 88, and, exceptiorthe` omission orn a gasket as 28h, of that at 82. Y

Should it be desired to insert a steam coil 88 (dotted lines, Il` ig. 5)its connections 8,9

and l0 may be made through the cover 29y in a Way similar to that usedand 87.

It is desirable to paint the inside surface of the receptacle 1 withacid proof paint to protect the steel or iron against `any volatile acidi'uines that might happenV to accidentally get in through the pressureor suction for the pipesl 86 line. While I prerer to make the lining 2of ,l lead is understood that I may'u'sepother iso material which is notattacked or corroded by the particular liquid that is to be handled.

Although l have described my invention as embodied in a blow casearranged so that the suction, or pressure, applied to the inside ofthelining is from the same source that applies the suction, or pressure, tothe outside of the lining, it will be understood, of course, that suchan arrangement, while convenient, is not essential, it being sufficientthat the same pressure, or suction, in the sense of degree and not ofcourse, be applied to the two sides of the lining. So that, in theappended claims, references to the same absolute pressureand so forth,have reference to the degree, the source being the same or different asthe ease may be.

l claim l.. ln an apparatus of the character indicated, in combination,a blow case element for handling fluid and comprising an inner and anouter receptacle spaced from each other to furnish an intermediatespace, a container element for the fluid, fluid conveying` connectionsbetween the inner receptacle of the blow case element and the containerelement, means for creating a desired absolute pressure in the innerreceptacle thereby to move the fluid from yone said element to theother, and means whereby the same absolute pressure is created in saidspace and applied to the exterior of said inner receptacle, as iscreated in, and applied to, the interior, whereby the pressure upon saidinner receptacle is equalized.

2; ln a blew case, in combination, an outer receptacle, an inner liningreceptacle received in the outer receptacle and spaced therefrom, fluidconveying means in connection with said inner receptacle, and means'providing for the application of the same absolute pressure to theinside of said inner` receptacle and to the space between the twotacles, thereby providing for the movement ofthe fluid being handled andequality of pressure on both sides of said inner lining receptacle.

8. ln a blow case, in combination, an outer receptacle, an inner liningreceptacle received in the outer receptacle and spaced therefrom, fluidconveying means in connection with said inner receptacle,`meansproviding for the application of suction to, and means providing for thealternative application of pressure to, the inside of said innerreceptacle and the space between the two receptacles, thereby providingfor the drawing of fluid into the case and the forcing of t e fluid outof the case, with equality of absolute pressure on both sides of saidinner receptacle.

e. "ln a blow case, in combination, an outer receptacle, an inner liningreceptacle received in the outer receptacle and spaced therefrom, fluidconveying means in connection with saidinner` receptacle, and means andto the space between thertwo receptacles, such means being in thecharacter of piping including a pipe entering the inner receptacle, apipe `ent'nhig said space, and a mainpipe, said three pipes being infree communication each 'with the other.y

5. ln a blow case, incombination, an outer receptacle, an inner outerreceptacle and spaced therefrom, fluid conveying means in connectionwith the in'- ner receptacle, and means whereby suction can be appliedto receptacle and to said space, such means being in the character of'line piping with a catch box inserted in the line.

6.' ln a blow case, in combination, an outer receptacle, an inner liningreceptacle in the outer receptacle and spaced therefrom, inflow andoutflow fluid conveying means in connection with said inner receptacle,a main pipe whereby fluid under pressure may be supplied, a pipeconnecting said main pipe and the space between said receptacles, a pipeconnecting said main pipe and thev interior of said fnner receptacle, asecond main pipe whereby ksuction may be applied, a pipe connecting saidsecond named main pipe with the space between said receptacles, a pipeconnecting said second named pipe with the interior of said innerreceptacle, and suitable valvesy arranged in certain of said pipes andin said fluid conveying means whereby suction may be applied to theinterior of said inner receptacle to draw fluid lining receptacle in thethe'inside of said inner.`

through the inflow means and at the same time the suction may be appliedto said space, and whereby, alternatively, fluid under pressure besupplied to the interior of said inner receptacle to force the conveyed'fluid through the outflow means and at the same time the pressure fluidmay be supplied to said space.

,7. ln a blow case, in combination, an outer receptacle provided with apipe, and an in-y ner receptacle received in the outer receptacle andspaced therefrom to provide an intermediate space, said inner receptaclebeing provided with a pipe positioned, and of a diameter, for receptionin said first named pipe, said pipes having provisions for the onesealing the other, thereby to seal said space from the atmosphere.

8. ln a blow case, in combination, an outerI receptacle provided with apipe having a flange at the outer end, and an inner yreceptacle receivedin the outer receptacle and spaced therefrom to provide an intermediatespace, said inner receptacle being provided with a pipe positioned, andof a diameter, for reception in said first named pipe, said second namedpipe being of greater length than the lirst named pipe and of malleablematerial, whereby the malleable pipe eX- tends beyond the flange of thefirst named pipe in position to be turned down upon said flange to form'a gasket and seal said` ceived in the outer receptacle and spacedtherefrom, fluid conveying means in connection with saidinnerreceptacle, and means for the application of desired absolute pressureto the inside of said inner receptacle and to the space between the tworeceptacles, there being means whereby change of absolute pressure uponone side of'said inner receptacle is transmitted to the other.

l0.- In a blow case, in combination, an outer receptacle, an innerreceptacle inthe outerV receptacle, fluid conveying means in connectionwith one of said receptacles, and means providing for the application ofthe same absolute pressure to both sides of one of the receptacles,thereby providingfor the movement, of the fluid being handled andequality of pressure onboth sides of said second named receptacle.

In testimony whereof I affix my signature.

MAURICE B. oooKE.`

